碱法蔗渣浆增强旧瓦楞纸浆的研究
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摘要
本实验将未漂碱法蔗渣浆与旧瓦楞纸箱(OCC)浆相混合,研究了其对OCC的增强性能。首先,从当地造纸厂收集蔗渣浆;并评价了蔗渣浆的打浆性能和强度变化。结果表明,采用高达200 kW/h的有效磨浆功率(SEL为0. 5 J/m)可提高纸浆强度性能。这表明轻度打浆有助于纸浆强度的提高,且采用低比边缘负荷时,对蔗渣浆纤维的松散结构不会产生严重影响。选用不同打浆度的蔗渣浆与未打浆的OCC浆混合,改变蔗渣浆的纤维占比且最高不超过20%。结果表明,添加较高用量、经打浆的蔗渣浆能够改善OCC浆除撕裂指数以外的其他所有性能。一般认为OCC浆已丧失结合能力,而加入经打浆的蔗渣浆后,可以提高OCC浆纤维间的结合。
Blending unbleached bagasse soda pulp with old corrugated container( OCC) pulp to reinforce the strength properties of the OCC is investigated. Firstly,bagasse pulp was collected from a local paper mill and the refining behaviour and strength development of this bagasse pulp were evaluated. The results demonstrated that application of up to 200 kW/h specific refining energy( SEL 0. 5 J/m),improved the strength properties. This indicated that mild refining is helpful in strength development of this pulp and the open structure of bagasse fibres do not impose severe problems if low specific edge load is used. Bagasse pulps refined to different degrees were selected for blending with unrefined OCC pulp. The ratios of bagasse refined pulp was varied up to 20% of the fibre furnish. The results revealed that higher dosages of the bagasse refined pulp improved all properties of the OCC pulp except tear index. It is generally accepted that OCC pulp has lost bonding potential between the fibres and adding refined bagasse pulp improves the inter-fibre bonding between the OCC fibres.
Blending unbleached bagasse soda pulp with old corrugated container( OCC) pulp to reinforce the strength properties of the OCC is investigated. Firstly,bagasse pulp was collected from a local paper mill and the refining behaviour and strength development of this bagasse pulp were evaluated. The results demonstrated that application of up to 200 kW/h specific refining energy( SEL 0. 5 J/m),improved the strength properties. This indicated that mild refining is helpful in strength development of this pulp and the open structure of bagasse fibres do not impose severe problems if low specific edge load is used. Bagasse pulps refined to different degrees were selected for blending with unrefined OCC pulp. The ratios of bagasse refined pulp was varied up to 20% of the fibre furnish. The results revealed that higher dosages of the bagasse refined pulp improved all properties of the OCC pulp except tear index. It is generally accepted that OCC pulp has lost bonding potential between the fibres and adding refined bagasse pulp improves the inter-fibre bonding between the OCC fibres.
引文